Rectangular spoiler metal honeycomb carrier

Abstract

The invention discloses a metal honeycomb carrier of a square piece spoiler type, which solves the problem that the existing honeycomb carrier has a relatively poor catalytic effect on flue gas of an internal combustion engine. The rectangular turbulent metal honeycomb carrier includes a superimposed body and a cylindrical shell, the superimposed body is inserted into the shell, the superimposed body includes staggered foil strips and flat sheets, and several crests arranged side by side are formed on the foil strips The crests and troughs are interlaced and connected to each other, and airflow channels are formed inside the crests and troughs, and the crests and troughs respectively constitute a part of the wall of the corresponding airflow channel. The flat sheet constitutes another part of the wall of the airflow channel, and is characterized in that several protruding rectangular sheets are arranged on the foil strip, and the outer corners of the rectangular sheet are sharp corners, and the rectangular sheet extends into the intercepting surface of the airflow channel , and accommodated in the airflow channel, the angle between the rectangular piece and the length direction of the airflow channel is between 0-60 degrees.

Description

technical field [0001] The invention relates to a metal honeycomb carrier used for catalytic purification of flue gas on automobiles and motorcycles. Background technique [0002] With the further implementation of the Euro V standard for motorcycle exhaust emissions, the motorcycle exhaust emission standards are getting higher and higher, especially the technical requirements for hydrocarbon emissions have become more stringent. It is difficult for catalysts made of conventional carriers to meet the existing standards. emission requirements. Conventional carriers used in existing motorcycle exhaust pipes are formed by rolling several layers of stacked flat sheets and corrugated sheet foils. The carrier is impregnated with a catalyst on the surface of the foil, and the flue gas after combustion of the internal combustion engine will contact the catalyst on the surface of the foil when it flows through the carrier, so that the catalytic purification of the flue gas can be re...

AI Technical Summary

Problems solved by technology

A number of separate airflow channels are formed in the carrier. When the gas flows through the carrier, the gas will pass through the airflow channel directly. The gas in the middle of the airflow channel is difficult to contact with the catalyst on the wall of the airflow channel, resulting in catalytic The effect is relatively poor

In the process of flue gas discharge, the gas flow velocity in the radial middle part of the gas flow channel is relatively fast, and the space velocity of the outer ring is relatively slow. The uneven gas flow velocity leads to uneven catalytic flue gas, and the catalytic effect is weakened.

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